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' R. P HATFIELD." GAS PRESSURE REGULATOR.

No. 331,878. Patented'Deo. 8, 1886.

WITNESSES:

drawing, forming a part of this specification,

UNIT D STATES ROBERT F. HATFIELD,

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OF NEYV YORK, N. Y.

GAS-PRESSURE REGULATOR.

LLE'SCIPICATION forming part of Letters Patent No. 331,878, dated December 8, 1885.

Application filed April 25, 1885.

To all whom it may concern:

Be it known that I, ROBERT F. HATFIELD, of the city, county, and State of New York, have invented certain new and useful Improve ments in Gas-Pressure Regulators, of which thefollowing is a full, clear, and exact description.

Reference is to be had to the accompanying andwhich is a sectional side elevation of one of my improved gas pressure regulators,

The object of this invention is to provide gaspressure regulators constructed in such a manner as to give notice, by the flaring of the lights, when the liquid needs replenishing, shut off the gas before the liquid becomes so low as to break the seal of the regulator, and prevent the gas from depositing its impurities in the liquid forming the seal.

The invention consists in the construction and combination .of various parts of a gaspressure regulator, as will be hereinafter fully described, and then pointed out in the claims.

A represents the case of the regulator, the top of which may be soldered or otherwise firmly secured in place. In the top of thecase A, near one side, is formed a hole, B, through which water or other suitable liquid can be poured into the said case. In the side of the case A is formed an overflow'hole, B, to prevent the liquid from rising too highin the said case in filling. The holes B B are closed with screw caps or plugs O 0, except when supplying the case A with liquid. In the center of the top of the case A is formed a pin-hole, B so that the air-pressure will be the same with in and without the said case. Vithin the case A is placed the regulator D, which is made of the same shape as the said case A, but smaller, so that there will bea space between the walls and tops of the said case and regulator, as shown in the drawing. The regulator D is made with a close top and an open bottom, and. within it is placed the float E, which is made smaller than the said regulator D, so that the said float can move up and down freely within the said regulator. Through the centers of the top and bottom of the float E are formed openings, in which is secured airtight a tube, F. As the float E moves up and down, the tube F slides upon the tube G, which serves as a guide to the said float in its movements.

The upward movement of the float E is limited by a shoulder or annular stop, H, attach ed to or formed upon the upper end of the tube G, and against which the top of the float E or the upper end of the tube F strikes. The lower end of the tube G passes water-tight through the center of the bottom of the case A, and is screwed into ascrew-hole in the upper end of the coupling I, secured to the said bottom of the case A. In the outer part of the lower end of the coupling I is screwed the upper endof the inlet-pipe J, and into the inner part of the said lower end is screwed the lower end of the tube K, which passes up through the interior of the tube G, and is made smaller than the said tube G, so as to leave an annular space around the said tube K for the passage of the gas. In the interior of the coupling I, around the lower part of the tube K, is formed an annular chamber, L, and in the side of the said coupling I is formed an opening, into which is screwed the end of the outlet-pipe M, through which the gas passes to the burners.

The upper end of the tube K rises a little above the upper end of the tube G, and in it is formed a seat, N, for the lower cone of the double-cone valve 0. To the lower end of the double cone 0 is attached the upper end of the short guide-tube P, fitting into and sliding in the upper part of the said tube K, so that the valve 0 will be made to move up and down vertically, and to always come squarely to its seat. In the upper end of the guide-tube P are formed openings Q, through which the gas can pass out when the valve 0 is raised from its seat N. Upon the upper end of the doublecoue valve 0 is formed a stem, which passes through the center of the top of the regulator D, and is secured to the said top by a nut or other suitable means.

To the upper end of the tube K is secured the lower end of the tubular cap R, in the top of which is formed an opening, through which the upper part of the double-cone valve 0 moves, and the edges of which are beveled to form a seat, S, for the upper cone of the said double-cone valve 0, the said opening being made of a size to give the required area of passage around the neck of the cone. The height of the cap R is made such that both valves 0 N and O S may be fully open at the same time, in order to give a full area of passage.

To the top of the float E, or to the upper end of the tube F, is attached the lower end of the tubular cap T, which is made so much larger than the tubular cap R as to leave an annular space between the said caps for the passage of the gas. In the top of the capT is formed an opening for the passage of the stem of the double-cone valve 0, and in the said opening, which is also made large enough to allow the passage of the gas into the regulator D, is secured a downwardly-projecting valveseat, U, to receive the upper part of the upper cone of the said valve 0.

The drawing shows the various parts of the machine in the positions they will have before the said machine is supplied with the liquid and before the gas is admitted.

Vhen the case A is filled with liquid up to the overflow-aperture B, the float E will rise upon the pipe G until it strikes against the stop B. As the float E rises, the top of the cap T strikes against the top of the regulator D, and raises the said regulator, and with it the double-cone valve 0, until the apertures Qin the tubular guide P are wholly above the valve-seat N, so that the gas, when admitted, will pass through the tube K, tubular guide P, and apertures Q into the interior of the cap R, and will pass through the aperture S in the top of the capR and the annular spaces between the caps R T and tubes K G into the annular chamber L, and thence into the pipe M, leading to the burners. At the same time a part of the gas passes through the aperture U in the top of the cap T, around the stem of the double-conevalve 0, into the in terior of the regulator D, and asit accumulates causes the said regulator to rise, gradually closing the valve 0 S, and thus regulating the amount of gas passing through the said valve 0 S, so that it has the same pressure as that in the regulator.

Since the space through which the float E rises before it strikes the stop H is greater than that through which the "double cone 0 rises before it reaches the seat S, the valve 0 U will always remain open until the level of the surface of the liquid in the case A is lowered, by evaporation, leakage, or otherwise, so much as to allow the float E to move down from the stop H. In this descent the float E first closes the valve 0 U, and then carries down the double cone 0, and withit the regulator D, opening the valve 0 S, and finally closing the valve 0 N, and thus preventing all entrance of gas into the regulator and all leakage of gas therefrom until the float E is again raised by pouring more liquid into the case A.

While the double cone 0 is being lowered to its seat N, by the action of the float E, the regulator D will not govern the pressure of the gas leaving the machine, which pressure will be the same as the gas had when entering the machine. This removal of the governing of the pressure by the regulator D will cause the lights to flare, and thus give a warning that-more liquid is needed in the case A. If this warning be disregarded, a further lowering of the float E will close the valve 0 N, and thus. shut off the gas. This closing of the valve 0 N will take place before the liquid in the case A has become so low as to break the seal of the regulator and permit gas to escape.

The action of the valve 0 U when the float E is moving downward is such that it closes all communication between the gas in the regulator D and that in the other parts of the machine at the same instant that the opening of the valve 0 S begins to be enlarged, so that the gas-pressure in the regulator D has no chance to be increased beyond its normal amount, which is that of holding the said regulator poised in equilibrium, and thus the float in moving downward does not have to contend with the full pressure of the incoming gas in the regulator D, but only with this pressure under the top of the cap T.

The pressure of the regulator D can be increased or lessened to any desired amount by adding weights to or removing them from the top of the regulator, the said regulator having the delicate sensitiveness of a float in a liquid.

With this construction the gas in its passage through the machine does not pass through the regulator D, and thus has no chance to deposit its impurities in the liquid in the case A.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In a gas-pressure regulator, the combination, with the regulator D, the double-cone valve 0, attached to the said regulator, the tube K, connecting with the inlet-pipe J, and having valve-seat N, and-the cap T, attached to the float E, of the cap R. having valve-opening S, and attached to the inlet-tube K, and the tube G, inclosing the said inlet-tube K, and connected with the pipe M, leading'to the burners, substantially as herein shown and described, whereby the gas, while having its pressure controlled by the regulator, will not pass through the said regulator in its passage through the machine, as set forth.

2. In a gas-pressure regulator, the combination, with the doublecone valve 0, the tube K, and the valve-seat N, of the tubular guide P, having openings Q at its upper end, substantially as herein shown and described, whereby the said cone-valve is guided squarely to its seat without obstructing the passage of the gas, as set forth.

J Arms TQGRAHAM, O. SEDGWICK. 

